The Somerset herald. [volume] (Somerset, Pa.) 1870-1936, 1887-03-02


amy KIND travels along a nerve. to be s5
: feet a second How East docs ~ound 5ray-
ei2 At an averge about l29 feet -sc-
ont, but at the zero Of Centisrieie ther-
mometer 1892 feet second Tempera-
ture exers an influence. We see sound
and light are both sensations caused BY
undu ations or waves The length Of
-eund-wave generated 10y mans voice.
IN common conversation. j. from eight 70
twelve feet. by woman voice from two
to four feet A woman's voice IN oriiHa-
. ~ conversation or pitch is aore than an
octave higher than man's : in the hign-
er sounds 1t a. rT0 octaves. ANY one viii
admit that d sound may be 80 iar thst be
eannof hear it. though another may. But
not everyone viii admit. at the first state
meu1. that q -ound may he pitched so
5,gh that Inc caHHot hear It. though an-
other may Vet such Is the fart Helm
holtz has found that sixteen vibrations.
er sound waves. "a second is the lowest
number that can be- heard. while $1,000
vibrations or sound-waves a second IS tine
highest number that can lc heard. 80
long then as sound j. Not 80 low "a, to
send less than sixteen vibrations 9r So
uj,.h as 70 send more than 5000 1ibrI-
jiou- a second 20 the ear II can be- heard
by some one. but ears ara not s-ved %
the -lme pitch ~uppose nav ears are
,-eeI % - vihrtons and % 5000 vi
hrafiou~ ~ecou,- while the normal IS
Is tor jow and 5000 Esr high- Then yaU
g,ln see that my ears viii be- stopped ~
many SOUNDS. both hsGh and low Many
persons cannot hear the -4ueah Of a bat,
or the note of a cricket er the rhirp o.. a
sparrow. because the~e are hlgH-pitehei
1ote--too higb for their ear.. and re-
member such persons are not deaf You
VIII think af this when Z ssale 60 -SpiIiH
coIor-hIindnes- by ami Hy
What ~ .ight2 say. light Is a mode Of
motion / have already said, sound
and Light are both sensations caused by
undulationS. or waves The 1la theo-
ry Of H-bt. advanced 1y the great sir
Isalc Newton ami called rHs Emission
or C1rpu-cuiar Theory, Nl- that Light
consisted of very small particles Of mat
ter. shot out with mcnuceiyabie rlpidiJg
bv luminous bodi-s that these PARTICLES
were 80 tine IS % pass through the pores
oT any transparent sub-t uce hence they
,.el'l readily pasS through the exterior
COATS. and the hunors of the eve. strike
against the expansion Of tine opar nerve
known a. the reuna. and in some way eS-
cite vision or sight want To look ct
some ogthe a.tirulrie, IN the way Of llis
theory
First. want Won ro take my wori Tor
il. light travel, 10000 miles second
let US sx this in ourn1iud- The surth Is
saw 25oH miles ia circuit Il light could
travel in curved tines aud be m.pie 20
pass around the aarth then a particle Of
light uould pIss = times arouni tie
earth. between ty,ftl-ks Of your watca
One IF our railroad trains here runs.
suppose. thirty miles an hour .t"oe-d
take II months 70 days. rs hours wi-h-
out "a stop, Go travel the distance Aga5
goes IN the single ~viugoi the pesda-in
Of "a -ranhtather's clock. All bodies have
weight These PARTICLES, If Ihey exist.
ara DO exception 4 BIT Of matter one
grain IN weight moving With t~- ,peed
of light would strike l- bard aS l't'-
pound cannon hal moving i-tF' feet
seroEi This Is 'iieuiation-noJ -''s7s
work. Ii light PARTICLES exist. li'.''i mil
han~ Of them have been concentrated oy
lenses and mirrors and ~hotar''1-t g i'''t-
ance suspended oy -iusie -F'.nr--
thread tins threai Though Invested i't'a
times, showed no tendeH'y 60 ant 'i-t. it
was without t'r-ion nu n' motion was
observed. Ihs>'- concentrated aH.ilonS
of PARTICLES po7ses-ed Ho weight. driven
with the speed OF l.2.ooo miiss q second
Can Won 7elieye TINS theory after tins
statement / cannot There arH other
objections an which shall not dwell
The other theory Is called the Theory
IF Cudulations. amt was ldyance by
the celebrated astronomer Euv.hens. and
the no less famous math amuician Euler.
Laplacc. Blot. Nllus and Brewster sup
ported Newton and the Curpu-cuIar
theory - but it WIS finally overrhr0wu
by the labers OF Dr. Thomas Young and
Augustine Fresne'.
i wide-lvake boy might say Bur
the earth'- atmosphere doesn't pervade
aIl space. What is there To make waves
in ar Tile point IS well taken" can
only answer There i-a supposit'on il
tins Just as there e in the torPu~eU.ar
Theory There Is supposed ,a be- a sub
stance kind Of universal Jrmo-phera,
pervadine an space, extending every
where. even between the atoms Of ths
most zoIi.l boiie~-tr ha- been named the
Luminous ether-that Is the light carry
ing atmosphere. In it waves are genera
tel in "a manner similar 90 that previously
explained for sound Bear in mind one
fact Just here before any reasonable
creature can accept any theory he must
De- satisfied that it is the best means Of
accounting for the various phenomena.
happening n that part Of the natural
world. Now this wayetheory is not only
the best, but It Is The on'f Hi'1'H that VIII